Samarium metal
TREM 99.50% min.
Sm/TREM 99.9%-99.99% min.
Non-Rare Earth impurities ( in ppm max.)
Fe 50 Si 30 Ca 50
Mg 30 Al 30 Ni 30
Cu 30 Ta 20 Ti 20
W 20 Mo 20 Pb 20
C 50 O 50 F 100
N 50 Cl 100 H 100
Any other element 10 max.

Eu metal

TREM 99.50% min.
Eu/TREM 99.9%-99.999% min.
Non-Rare Earth impurities ( in ppm max.)
Fe 50 Si 30 Ca 50
Mg 30 Al 30 Ni 30
Cu 30 Ta 20 Ti 20
W 20 Mo 20 Pb 20
C 50 O 50 F 100
N 50 Cl 100 H 200
Any other element 10 max.

Gadolinium metal
TREM 99.50% min.
Gd/TREM 99.9%-99.999% min.
Non-Rare Earth impurities ( in ppm max.)
Fe 100 Si 50 Ca 50
Mg 50 Al 50 Ni 50
Cu 50 Ta 50 Ti 50
W 50 Mo 50 Pb 50
C 50 O 200 F 100
N 50
Any other element 20 max.

Terbium metal
TREM 99.50% min.
Tb/TREM 99.9%-99.999% min.
Non-Rare Earth impurities ( in ppm max.)
Fe 100 Si 50 Ca 50
Mg 50 Al 50 Ni 50
Cu 50 Ta 50 Ti 50
W 50 Mo 50 Pb 50
C 50 O 200 F 100
N 50
Any other element 20 max.

Dysprosium metal
TREM 99.50% min.
Dy/TREM 99.9%-99.999% min.
Non-Rare Earth impurities ( in ppm max.)
Fe 100 Si 50 Ca 50
Mg 50 Al 50 Ni 50
Cu 50 Ta 50 Ti 50
W 50 Mo 50 Pb 50
C 50 O 200 F 100
N 50
Any other element 20 max.

Holmium metal
TREM 99.50% min.
Ho/TREM 99.9%-99.999% min.
Non-Rare Earth impurities ( in ppm max.)
Fe 100 Si 50 Ca 50
Mg 50 Al 50 Ni 50
Cu 50 Ta 50 Ti 50
W 50 Mo 50 Pb 50
C 50 O 200 F 100
N 50
Any other element 20 max.

Erbium metal
TREM 99.50% min.
Er/TREM 99.9%-99.999% min.
Non-Rare Earth impurities ( in ppm max.)
Fe 100 Si 50 Ca 50
Mg 50 Al 50 Ni 50
Cu 50 Ta 50 Ti 50
W 50 Mo 50 Pb 50
C 50 O 200 F 100
N 50
Any other element 20 max.

Thulium metal
TREM 99.50% min.
Tm/TREM 99.9%-99.99% min.
Non-Rare Earth impurities ( in ppm max.)
Fe 50 Si 50 Ca 50
Mg 50 Al 50 Ni 50
Cu 50 Ta 50 Ti 50
W 50 Mo 50 Pb 50
C 50 O 200 F 100
N 50 Cl 100 H 100
Any other element 20 max.

Ytterbium metal
TREM 99.50% min.
Yb/TREM 99.9%-99.99% min.
Non-Rare Earth impurities ( in ppm max.)
Fe 50 Si 50 Ca 50
Mg 50 Al 50 Ni 50
Cu 50 Ta 50 Ti 50
W 50 Mo 50 Pb 50
C 50 O 200 F 100
N 50 Cl 100 H 100
Any other element 20 max.

Lutetium metal
TREM 99.50% min.
Lu/TREM 99.9%-99.999% min.
Non-Rare Earth impurities ( in ppm max.)
Fe 100 Si 50 Ca 50
Mg 50 Al 50 Ni 50
Cu 50 Ta 50 Ti 50
W 50 Mo 50 Pb 50
C 50 O 200 F 100
N 50
Any other element 20 max.

Scandium metal
TREM 99.50% min.
Sc/TREM 99.9%-99.999% min.
Non-Rare Earth impurities ( in ppm max.)
Fe 100 Si 50 Ca 50
Mg 50 Al 50 Ni 50
Cu 50 Ta 50 Ti 50
W 50 Mo 50 Pb 50
C 50 O 200 F 100
N 50
Any other element 20 max.

Yttrium metal
TREM 99.50% min.
Y/TREM 99.50%-99.9% min.
Non-Rare Earth impurities ( in ppm max.)
O 1300 C 100 N 100
W 600 Ta 100 Ca 300
Ti 100 Si 300 Mg 200
Al 200 Mn 100 Fe 1000
Al 100 Co 100

Yttrium Aluminum alloy
Yttrium: approx. 87%
Aluminum: approx. 13%
Y/TREM 99.9% min.
Rare Earth impurities ( in TREM, % max. )
La 0.01
Sm 0.001
Ho 0.001
Gd 0.001
Tb 0.001
Dy 0.001
Non- Rare Earth impurities ( % max. )
Ca 0.05
Si 0.02
Fe 0.15
O 0.25
N 0.01
C 0.01
S 0.005
Cu 0.01
Ta 0.01
Ti 0.001
Mn 0.005

1. Neodymium metal 99.9%
TREM 99%min.
Nd/TREM 99.9%min.
Rare Earth impurities ( in TREM of ppm max. )
La 100 Ce 200 Pr 400
Sm 200 Y 100
Non-Rare Earth impurities ( in ppm max. )
Fe 2000 Al 500 Si 500
Ca 100 Mg 100 Mn100
Ni 100 Cr 100 Mo 500
W 500 Ti 200 Ta 100
C 300 O 500 N 100

2. Samarium metal 99.9%
TREM 99.5% min.
Sm/TREM 99.9% min.
Rare Earth impurities ( in TREM of ppm max.)
La 100 Ce 50 Pr 50
Nd 120 Eu 100 Gd 50
Tb 5 Dy 10 Ho 10
Er 50 Tm 10 Yb 5
Lu 5 Y 5
Non-Rare Earth impurities ( in ppm max.)
Fe 100 Si 100 Ca 100
Mg 100 Al 100 W 10
Ni 100 Ta 100 Mo 100
C 100 O 300 Cl- 200

3. Eu metal  99.99%
TREM 99.95%min.
Eu/TREM 99.99% min.
Rare Earth impurities ( in ppm )
Sc 1.0 La 6.0 Ce 0.2
Pr 0.3 Nd 1.0 Sm 90
Gd 1.0 Tb 0.5 Dy 0.8
Ho 0.3 Er 1.2 Tm 0.5
Yb 1.0 Lu 0.5 Y 0.5
Non-Rare Earth impurities ( in ppm )
Pb 2.0 Fe 5.0 Si 7.0
Ca 8.0 Mg 6.0 Cu 2.0
Ni 3.0 Al 6.0 Zn 5.0
Ti 0.2 Mo 1.0 Cr 1.0
Mn 8.0 Ta 1.0 W 1.0
Li 1.0 Be 0.5 B 0.5
Na 5.0 P 15 K 5.0
V 1 Co 0.5 Ga 0.1
Ge 0.1 As 1 Se 0.5
Rb 0.1 Sr 2.0 Zr 0.5
Nb 0.5 Rb 0.1 Pd 0.2
Ag 0.1 In 0.2 Sn 0.1
Sb 0.5 Te 0.1 I 0.1
Cs 0.1 Ba 3.0 Hf 0.2
Re 0.1 Os 0.1 Ir 0.1
Pt 01 Au 0.1 Hg 0.05
Tl 0.1 Bi 0.1 Po 0.1
At 0.1 Fr 0.1 Ra 0.1
Ac 0.1 Tn 0.1 Au 0.1
Lr 0.1 Ru 0.1 Pa 0.1
U 0.1 Np 0.1 Pu 0.1
Am 0.1 Cm 0.1 Bk 0.1
Cf 0.1 Es 0.1 Fm 0.1
Md 0.1 No 0.1 Br 0.5
Cl 25 H 5 C 36
N 38 O 245 F 5

4. Gadolinium metal 99.9%
TREM 99.5% min
Gd/TREM 99.9% min
Rare Earth impurities ( in TREM of ppm max. )
Sm 60 Y 60 Gd 60
Dy 60 Ho 60 Er 60
La 20 Ce 20 Lu 20
Yb 30
Non-Rare Earth impurities ( in ppm max. )
Si 60 Cu 60 Mg 80
Ta 60 S 30 Al 110
Mn 110 Ni 110 Cr 110
Ca 400 O 1000 N 100
C 110 Ti 60 Mo 60

5. Terbium metal 99.9%
TREM 99.5% min
Tb/TREM 99.9% min
Rare Earth impurities ( in TREM of ppm max. )
Sm 60 Y 60 Gd 60
Dy 60 Ho 60 Er 60
La 20 Ce 20 Lu 20
Yb 30
Non-Rare Earth impurities ( in ppm max. )
Si 60 Cu 60 Mg 80
Ta 60 S 30 Al 110
Mn 110 Ni 110 Cr 110
Ca 400 O 1000 N 100
C 110 Ti 60 Mo 60

6. Dysprosium metal 99.5%
TREM 99% min.
Dy/TREM 99.9% min.
Rare Earth impurities ( in TREM of ppm max.)
La 200 Ce 50 Pr 100
Nd 500 Sm 20 Eu 10
Gd 100 Tb 500 Ho 300
Er 300 Tm 30 Yb 20
Lu 180 Y 100
Non-Rare Earth impurities ( in ppm max.)
Fe 1000 Al 300 Si 300
Ca 800 Mg 100 Mn 100
Ni 500 Ta 100 C 300
O 1200 N 300 W 500

7. Thulium metal 99.986%
TREM 99.95%min.
Tm/TREM 99.986% min.
Rare Earth impurities ( in ppm )
Sc 0.1 La 3.0 Ce 0.1
Pr 0.1 Nd 0.5 Sm 0.1
Eu 0.1 Gd 0.5 Tb 0.1
Dy 17 Ho 1.0 Er 15
Yb 100 Lu 0.3 Y 0.1
Non-Rare Earth impurities ( in ppm)
Mn 24 Fe 22 Si 10
Ca 27 Mg 3.0 Cu 7.0
Ni 0.5 Al 2.0 Zn 7.0
Ti 1.0 Mo 0.5 Cr 2.0
Pb 1.0 Ta 0.5 W 0.5
Li 0.1 Be 0.1 B 0.5
Na 3.0 P 1.0 K 1.0
V 0.5 Co 0.1 Ga 0.1
Ge 0.1 As 0.2 Se 0.1
Rb 0.1 Sr 0.1 Zr 0.1
Nb 0.1 Tc 0.1 Ru 0.1
Rh 0.1 Pd 0.1 Ag 0.1
In 0.1 Sn 0.1 Sb 0.1
Te 0.1 I 0.1 Cs 0.1
Ba 0.5 Hf 0.1 Re 0.1
Os 0.1 Ir 0.1 Pt 0.1
Au 0.1 Hg 0.1 Tl 0.1
Lr 0.1 Bi 0.1 Po 0.1
At 0.1 Fr 0.1 Ra 0.1
Ac 0.1 Tn 0.1 Pa 0.1
U 01 Np 01 Pu 0.1
Am 0.1 Cm 0.1 Bk 0.1
Cf 0.1 Es 0.1 Fm 0.1
Md 0.1 No 0.1 Br 0.5
Cl 10 H 5.0 C 56
N 58 O 240 F 10

8. Yttrium metal 99.9%
TREM 99.50% min.
Y/TREM 99.9% min.
Rare Earth impurities ( in TREM of ppm max. )
Sm 50 Tb 50 Ho 50
Er 50 Lu 50 La 50
Dy 50 Yb 50 Eu 50
Non-Rare Earth impurities ( in ppm max. )
S 100 Cu 100 O 1300
Ca 300 Ti 100 W 600
N 100 C 100 Si 500
Mn 100 Fe 1500 Ta 100
Al 100 Co 100

9. Lutetium metal 99.9997%
TREM 99.97%min.
Lu/TREM 99.9997% min.
Rare Earth impurities ( in ppm )
Sc 0.1 La 0.2 Ce 0.3
Pr 0.1 Nd 0.1 Sm 0.1
Eu 0.1 Gd 0.1 Tb 0.1
Dy 0.2 Ho 0.1 Er 0.2
Tm 0.1 Yb 1.5 Y 0.2
Non-Rare Earth impurities ( in ppm )
Mn 1.0 Fe 38 Si 10
Ca 12 Mg 1.0 Cu 2.0
Ni 2.0 Al 1.0 Zn 0.2
Ti 0.2 Mo 0.1 Cr 1.0
Pb 3.0 Ta 1.0 W 0.1
Li 0.2 Be 0.1 Na 3.0
P 5.0 K 1.0 V 0.1
Co 0.1 Ga 0.1 Ge 0.1
As 0.2 Rb 0.1 Sr 0.1
Zr 0.1 Nb 0.1 Tc 0.1
Ru 0.1 Rh 0.1 Pd 0.1
Ag 0.1 In 0.1 Sn 0.1
Sb 0.1 Te 0.1 I 0.1
Cs 0.1 Ba 0.1 Hf 0.1
Re 0.1 Os 0.1 Ir 0.1
Pt 0.1 Au 0.1 Hg 0.1
Tl 0.1 Lr 0.1 Bi 0.1
Po 0.1 At 0.1 Fr 0.1
Ra 0.1 Ac 0.1 Tn 0.1
Pa 0.1 U 0.1 Np 0.1
Pu 0.1 Am 0.1 Cm 0.1
Bk 0.1 Cf 0.1 Es 0.1
Fm 0.1 Md 0.1 No 0.1
Br 2.0 Cl 10 H 5.0
C 55 N 57 O 48
F 54